feat(webui): refine output timeline and model controls (#4108)

* feat(webui): refine output timeline and composer queue

* feat(webui): add provider model picker

* fix(webui): polish model settings and heartbeat checks

* chore: keep heartbeat changes out of webui pr

* refactor(webui): isolate settings routes

* fix(providers): align minimax anthropic test

* fix(providers): keep minimax anthropic base sdk-compatible

* fix(providers): normalize anthropic base urls

nanobot/webui/transcript.py

@@ -27,6 +27,7 @@ _INLINE_MARKDOWN_IMAGE_EXTS: frozenset[str] = frozenset({
     ".jpeg",
     ".webp",
     ".gif",
+    ".svg",
 })
 _INLINE_MARKDOWN_VIDEO_EXTS: frozenset[str] = frozenset({
     ".mp4",
@@ -87,7 +88,12 @@ def rewrite_local_markdown_images(
 
 
 def _media_kind_from_name(name: str) -> str:
-    return "video" if Path(name).suffix.lower() in _INLINE_MARKDOWN_VIDEO_EXTS else "image"
+    ext = Path(name).suffix.lower()
+    if ext in _INLINE_MARKDOWN_IMAGE_EXTS:
+        return "image"
+    if ext in _INLINE_MARKDOWN_VIDEO_EXTS:
+        return "video"
+    return "file"
 
 
 def webui_transcript_path(session_key: str) -> Path: